Listening in the bog: I. Acoustic interactions and spacing between males of Sphagniana sphagnorum
| Autor: | Glenn K. Morris, Aaron M. Hall, Heiner Römer |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Periodicity Sound Spectrography Physiology Zoology 010603 evolutionary biology 01 natural sciences Sphagnum Acoustic spacing Sexual Behavior Animal Behavioral Neuroscience Animals 0501 psychology and cognitive sciences 050102 behavioral science & comparative psychology Katydid Bog Ecology Evolution Behavior and Systematics Original Paper geography geography.geographical_feature_category biology Sound transmission 05 social sciences Sphagniana sphagnorum Acoustics biology.organism_classification Distance estimation Animal Communication Aggression Boreal Conocephalus fasciatus Sympatric speciation Wetlands behavior and behavior mechanisms Orthoptera Animal Science and Zoology Linear correlation |
| Zdroj: | Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology |
| ISSN: | 1432-1351 0340-7594 |
| DOI: | 10.1007/s00359-018-1250-8 |
| Popis: | Males of the katydid Sphagniana sphagnorum form calling aggregations in boreal sphagnum bogs to attract mates. They broadcast frequency-modulated (FM) songs in steady series, each song comprised of two wing-stroking modes that alternate audio and ultrasonic spectra. NN analysis of three populations found mean distances between 5.1 and 8.4 m, but failed to find spacing regularity: in one males spaced randomly, in another they were clumped, but within the clumps spaced at random. We tested a mechanism for maintaining inter-male distances by playback of conspecific song to resident males and analysing song interactions between neighbouring males in the field. The results indicate that the song rate is an important cue for males. Information coded in song rates is confounded by variation in bog temperatures and by the linear correlation of song rates with temperature. The ultrasonic and audio spectral modes suffer different excess attenuation: the ultrasonic mode is favoured at shorter distances ( 6 m), supporting a hypothesized function in distance estimation. Another katydid, Conocephalus fasciatus, shares habitat with S. sphagnorum and could mask its ultrasonic mode; however, mapping of both species indicate the spacing of S. sphagnorum is unaffected by the sympatric species. Electronic supplementary material The online version of this article (10.1007/s00359-018-1250-8) contains supplementary material, which is available to authorized users. |
| Databáze: | OpenAIRE |
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